Class: Foobara::Persistence::EntityBase::TransactionTable

Inherits:
Object
  • Object
show all
Includes:
Concerns::Queries, Concerns::RecordTracking
Defined in:
foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb,
foobara-0.0.110/projects/persistence/src/entity_base/transaction_table/concerns/queries.rb,
foobara-0.0.110/projects/persistence/src/entity_base/transaction_table/concerns/record_tracking.rb

Overview

TODO: move this under Transaction

Defined Under Namespace

Modules: Concerns Classes: NoRecordFound

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(transaction, entity_class) ⇒ TransactionTable

Returns a new instance of TransactionTable.



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 25

def initialize(transaction, entity_class)
  self.transaction = transaction
  self.entity_class = entity_class
  self.entity_attributes_crud_driver_table = transaction.entity_attributes_crud_driver.table_for(entity_class)

  super()
end

Instance Attribute Details

#entity_attributes_crud_driver_table ⇒ Object

Returns the value of attribute entity_attributes_crud_driver_table.



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 21

def entity_attributes_crud_driver_table
  @entity_attributes_crud_driver_table
end

#entity_class ⇒ Object

Returns the value of attribute entity_class.



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 21

def entity_class
  @entity_class
end

#transaction ⇒ Object

Returns the value of attribute transaction.



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 21

def transaction
  @transaction
end

Instance Method Details

#all_exist?(record_ids) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 470

def all_exist?(record_ids)
  to_check_ids = record_ids.reject do |record_id|
    record = tracked_records.find_by_key(record_id)
    record && !record.hard_deleted? && (!record.persisted? || record.loaded?)
  end

  to_check_ids.empty? || entity_attributes_crud_driver_table.all_exist?(to_check_ids)
end

#count ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 456

def count
  persisted_count = entity_attributes_crud_driver_table.count

  persisted_count + marked_created.count - marked_hard_deleted.count
end

#exists?(record_id) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 462

def exists?(record_id)
  record = tracked_records.find_by_key(record_id)
  # TODO: stamp the fact that it exists on the record somehow or in the record_tracking concern.

  (record && !record.hard_deleted? && (!record.persisted? || record.loaded?)) ||
    entity_attributes_crud_driver_table.exists?(record_id)
end

#find_all_by_attribute(attribute_name_or_path, value) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 228

def find_all_by_attribute(attribute_name_or_path, value)
  find_many_by(attribute_name_or_path => value)
end

#find_all_by_attribute_any_of(attribute_name, values) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 384

def find_all_by_attribute_any_of(attribute_name, values)
  values = Util.array(values)
  return [] if values.empty?

  value_type = entity_class.attributes_type.element_types[attribute_name]

  values = values.map do |value|
    value_type.process_value!(value)
  end

  yielded_ids = Set.new

  Enumerator.new do |yielder|
    tracked_records.each do |record|
      next if hard_deleted?(record)

      record_value = record.read_attribute(attribute_name)

      # TODO: what if there are multiple??
      if values.include?(record_value)
        yielded_ids << record.primary_key
        yielder << record
      end
    end

    values = values.map do |value|
      to_persistable(value, false)
    end

    entity_attributes_crud_driver_table.find_all_by_attribute_any_of(
      attribute_name, values
    ).each do |found_attributes|
      found_attributes = normalize_attributes(found_attributes)
      record_id = primary_key_for_attributes(found_attributes)

      next if yielded_ids.include?(record_id)

      record = find_tracked(record_id) || entity_class.loaded(found_attributes)

      yielder << record
    end
  end
end

#find_all_by_attribute_containing_any_of(attribute_name, values) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 336

def find_all_by_attribute_containing_any_of(attribute_name, values)
  values = Util.array(values)
  return [] if values.empty?

  value_type = entity_class.attributes_type.element_types[attribute_name].element_type

  values = values.map do |value|
    value_type.process_value!(value)
  end

  yielded_ids = Set.new

  Enumerator.new do |yielder|
    tracked_records.each do |record|
      next if hard_deleted?(record)

      record_values = record.read_attribute(attribute_name)
      next unless record_values
      next if record_values.empty?

      # TODO: what if there are multiple??
      values.each do |value|
        if record_values.include?(value)
          yielded_ids << record.primary_key
          yielder << record
        end
      end
    end

    values = values.map do |value|
      to_persistable(value, false)
    end

    entity_attributes_crud_driver_table.find_all_by_attribute_containing_any_of(
      attribute_name, values
    ).each do |found_attributes|
      found_attributes = normalize_attributes(found_attributes)
      record_id = primary_key_for_attributes(found_attributes)

      next if yielded_ids.include?(record_id)

      record = find_tracked(record_id) || entity_class.loaded(found_attributes)

      yielder << record
    end
  end
end

#find_by(attributes_filter) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 254

def find_by(attributes_filter)
  element_types = entity_class.attributes_type.element_types

  attributes_filter = attributes_filter.to_h do |attribute_name, value|
    [attribute_name,  element_types[attribute_name].process_value!(value)]
  end

  tracked_records.each do |record|
    next if hard_deleted?(record)

    if entity_attributes_crud_driver_table.matches_attributes_filter?(record.attributes, attributes_filter)
      return record
    end
  end

  found_attributes = entity_attributes_crud_driver_table.find_by(attributes_filter)

  if found_attributes
    found_attributes = normalize_attributes(found_attributes)
    record_id = primary_key_for_attributes(found_attributes)

    record = find_tracked(record_id)
    return record if record

    entity_class.loaded(found_attributes)
  end
end

#find_by_attribute(attribute_name, value) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 224

def find_by_attribute(attribute_name, value)
  find_by(attribute_name => value)
end

#find_by_attribute_containing(attribute_name, value) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 232

def find_by_attribute_containing(attribute_name, value)
  value = entity_class.attributes_type.element_types[attribute_name].element_type.process_value!(value)

  tracked_records.each do |record|
    next if hard_deleted?(record)

    # TODO: what if there are multiple??
    if record.read_attribute(attribute_name).include?(value)
      return record
    end
  end

  found_attributes = entity_attributes_crud_driver_table.find_by_attribute_containing(
    attribute_name,
    to_persistable(value, false)
  )

  if found_attributes
    entity_class.loaded(normalize_attributes(found_attributes))
  end
end

#find_many_by(attributes_filter) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 282

def find_many_by(attributes_filter)
  find_by_type = entity_class.domain.foobara_type_from_declaration(entity_class.attributes_for_find_by)

  path_filters = {}
  regular_filters = {}

  attributes_filter.each_pair do |attribute_name_or_path, value|
    case attribute_name_or_path
    when ::Symbol, ::String
      regular_filters[attribute_name_or_path] = value
    when ::Array, Value::DataPath
      path_filters[attribute_name_or_path] = value
    else
      # :nocov:
      raise "Unexpected filter type: #{attribute_name_or_path.class}"
      # :nocov:
    end
  end

  regular_filters = find_by_type.process_value!(regular_filters)

  path_filters.keys.each do |path|
    type = entity_class.deep_associations[DataPath.for(path).to_s]
    path_filters[path] = type.process_value!(path_filters[path])
  end

  attributes_filter = regular_filters.merge(path_filters)

  yielded_ids = Set.new

  Enumerator.new do |yielder|
    tracked_records.each do |record|
      next if hard_deleted?(record)
      next unless record.loaded? || record.built? || record.created?

      if entity_attributes_crud_driver_table.matches_attributes_filter?(record.attributes, attributes_filter)
        yielded_ids << record.primary_key
        yielder << record
      end
    end

    entity_attributes_crud_driver_table.find_many_by(attributes_filter).each do |found_attributes|
      found_attributes = normalize_attributes(found_attributes)
      record_id = primary_key_for_attributes(found_attributes)

      next if yielded_ids.include?(record_id)

      record = find_tracked(record_id) || entity_class.loaded(found_attributes)

      yielder << record
    end
  end
end

#find_tracked(record_id) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 33

def find_tracked(record_id)
  unless record_id
    # :nocov:
    raise ArgumentError, "Cannot use a blank primary key value"
    # :nocov:
  end

  if record_id.is_a?(::String) && record_id.empty?
    # :nocov:
    raise ArgumentError, "Cannot use a blank primary key value"
    # :nocov:
  end

  if record_id.is_a?(::Symbol) && record_id.to_s.empty?
    # :nocov:
    raise ArgumentError, "Cannot use a blank primary key value"
    # :nocov:
  end

  tracked_records.find_by_key(record_id)
end

#first ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 55

def first
  found_attributes = normalize_attributes(entity_attributes_crud_driver_table.first)

  if found_attributes
    record_id = primary_key_for_attributes(found_attributes)

    record = tracked_records.find_by_key(record_id) || transaction.loaded(entity_class, found_attributes)

    record || marked_created.first
  end
end

#flush_created! ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 520

def flush_created!
  marked_created.each do |record|
    tracked_records.delete(record)

    flush_created_associations!(record)

    # TODO: do this in bulk
    attributes = entity_attributes_crud_driver_table.insert(to_persistable(record))
    record.write_attributes_without_callbacks(attributes)

    # we need to update finding the tracked object by key and removing/reading it seems to be the simplest
    # way to accomplish that at the moment
    tracked_records << record

    record.is_persisted = record.is_loaded = true
    record.is_created = false
    record.save_persisted_attributes
  end

  marked_created.clear
end

#flush_created_associations!(record) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 561

def flush_created_associations!(record)
  entity_class.associations.each_key do |association_data_path|
    DataPath.values_at(association_data_path, record).each do |associated_record|
      next unless associated_record.created?

      transaction = Persistence::EntityBase::Transaction.open_transaction_for(associated_record)

      unless transaction
        # :nocov:
        raise "No open transaction for #{associated_record}"
        # :nocov:
      end

      if transaction.created?(associated_record)
        transaction.flush_created_record!(associated_record)
      end
    end
  end
end

#flush_created_record!(record) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 542

def flush_created_record!(record)
  tracked_records.delete(record)

  flush_created_associations!(record)

  unmark_created(record)

  attributes = entity_attributes_crud_driver_table.insert(to_persistable(record))
  record.write_attributes_without_callbacks(attributes)

  # we need to update finding the tracked object by key and removing/reading it seems to be the simplest
  # way to accomplish that at the moment
  tracked_records << record

  record.is_persisted = record.is_loaded = true
  record.is_created = false
  record.save_persisted_attributes
end

#flush_updated_and_hard_deleted! ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 581

def flush_updated_and_hard_deleted!
  # TODO: use bulk operations to improve performance...
  marked_updated.each do |record|
    attributes = entity_attributes_crud_driver_table.update(to_persistable(record))
    record.write_attributes_without_callbacks(attributes)
    record.save_persisted_attributes
  end

  marked_updated.clear

  # TODO: use bulk operations to improve performance...
  marked_hard_deleted.each do |record|
    entity_attributes_crud_driver_table.hard_delete(record.primary_key)
    record.save_persisted_attributes
  end

  marked_hard_deleted.clear
end

#hard_delete_all! ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 446

def hard_delete_all!
  tracked_records.each do |record|
    record.hard_delete! unless record.hard_deleted?
  end

  entity_attributes_crud_driver_table.hard_delete_all

  all_hard_deleted
end

#load(entity_or_record_id) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 67

def load(entity_or_record_id)
  if entity_or_record_id.is_a?(Entity)
    if entity_or_record_id.loaded?
      # :nocov:
      raise "#{entity_or_record_id} is already loaded!"
      # :nocov:
    end

    entity = tracked_records[entity_or_record_id]

    if entity && !entity.equal?(entity_or_record_id)
      # :nocov:
      raise "This transaction is already tracking a different entity with the same primary key." \
            "Try passing in the primary key instead of constructing an unloaded entity to pass in."
      # :nocov:
    end

    record_id = entity.primary_key
  else
    record_id = entity_or_record_id

    if record_id.is_a?(::Hash)
      # :nocov:
      raise ArgumentError, "Unlikely that you meant to use a hash as a primary key"
      # :nocov:
    end

    unless record_id
      # :nocov:
      raise ArgumentError, "Cannot use a blank primary key value"
      # :nocov:
    end

    if record_id.is_a?(::String) && record_id.empty?
      # :nocov:
      raise ArgumentError, "Cannot use a blank primary key value"
      # :nocov:
    end

    if record_id.is_a?(::Symbol) && record_id.to_s.empty?
      # :nocov:
      raise ArgumentError, "Cannot use a blank primary key value"
      # :nocov:
    end

    entity = tracked_records.find_by_key(record_id)

    if entity&.loaded?
      return entity
    end
  end

  if entity
    loading(entity) do
      attributes = normalize_attributes(entity_attributes_crud_driver_table.find!(record_id))

      unless attributes
        # :nocov:
        raise NoRecordFound, "could not find record for #{entity_class.full_entity_name}:#{record_id}"
        # :nocov:
      end

      entity.successfully_loaded(attributes)
    end
  else
    attributes = normalize_attributes(entity_attributes_crud_driver_table.find!(record_id))

    unless attributes
      # :nocov:
      raise NoRecordFound, "could not find record for #{entity_class.full_entity_name}:#{record_id}"
      # :nocov:
    end

    transaction.loaded(entity_class, attributes)
  end
end

#load_many(record_ids_or_entities) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 144

def load_many(record_ids_or_entities)
  to_load_record_ids = []
  entities = {}

  record_ids_or_entities.each do |entity_or_record_id|
    if entity_or_record_id.is_a?(Entity)
      if entity_or_record_id.loaded?
        next
      end

      entity = tracked_records[entity_or_record_id]

      if entity && !entity.equal?(entity_or_record_id)
        # :nocov:
        raise "This transaction is already tracking a different entity with the same primary key." \
              "Try passing in the primary key instead of constructing an unloaded entity to pass in."
        # :nocov:
      end

      record_id = entity.primary_key
      to_load_record_ids << record_id
      entities[record_id] = entity
    else
      record_id = entity_or_record_id

      if record_id.is_a?(::Hash)
        # :nocov:
        raise ArgumentError, "Unlikely that you meant to use a hash as a primary key"
        # :nocov:
      end

      # TODO: encapsulate this record_id verification
      unless record_id
        # :nocov:
        raise ArgumentError, "Cannot use a blank primary key value"
        # :nocov:
      end

      if record_id.is_a?(::String) && record_id.empty?
        # :nocov:
        raise ArgumentError, "Cannot use a blank primary key value"
        # :nocov:
      end

      if record_id.is_a?(::Symbol) && record_id.to_s.empty?
        # :nocov:
        raise ArgumentError, "Cannot use a blank primary key value"
        # :nocov:
      end

      entity = tracked_records.find_by_key(record_id)

      if entity
        if entity.loaded?
          entities[record_id] = entity
        end
      else
        entities[record_id] = entity_class.thunk(record_id)
        to_load_record_ids << record_id
      end
    end
  end

  entity_attributes_crud_driver_table.find_many!(to_load_record_ids).each do |attributes|
    attributes = normalize_attributes(attributes)
    record_id = primary_key_for_attributes(attributes)
    entity = entities[record_id]
    entity.successfully_loaded(attributes)
    entities[record_id] = entity
  end

  record_ids_or_entities.map do |record_id_or_entity|
    if record_id_or_entity.is_a?(Entity)
      record_id_or_entity
    else
      entities[record_id_or_entity]
    end
  end
end

#primary_key_for_attributes(attributes) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 479

def primary_key_for_attributes(attributes)
  attributes[entity_class.primary_key_attribute]
end

#revert! ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 612

def revert!
  # TODO: could pause record tracking while doing this as a performance boost
  marked_updated.each(&:restore_without_callbacks!)
  marked_hard_deleted.each(&:restore_without_callbacks!)
  marked_created.each(&:restore_without_callbacks!)

  reverted
end

#rollback! ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 600

def rollback!
  # TODO: could pause record tracking while doing this as a performance boost
  # is it really safe to do this without callbacks?? What about other systems listening
  # to those callbacks? This feels wrong.
  # TODO: fix this
  marked_updated.each(&:restore_without_callbacks!)
  marked_hard_deleted.each(&:restore_without_callbacks!)
  marked_created.each(&:hard_delete_without_callbacks!)

  rolled_back
end

#to_persistable(object, initial = true) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 483

def to_persistable(object, initial = true)
  case object
  when Entity
    if initial
      to_persistable(object.attributes, false)
    else
      object.primary_key
    end
  when Model
    to_persistable(object.attributes, false)
  when ::Hash
    object.transform_values do |value|
      to_persistable(value, false)
    end
  when ::Array
    object.map do |element|
      to_persistable(element, false)
    end
  else
    object
  end
end

#track_created(entity) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 432

def track_created(entity)
  if entity.persisted?
    # :nocov:
    raise "Cannot insert #{entity} because it's already persisted."
    # :nocov:
  end

  created(entity)
end

#track_loaded(entity) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 442

def track_loaded(entity)
  tracked_records << entity
end

#track_unloaded_thunk(record) ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 428

def track_unloaded_thunk(record)
  tracked(record)
end

#tracking?(record) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 621

def tracking?(record)
  tracked_records.include?(record)
end

#validate! ⇒ Object 



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# File 'foobara-0.0.110/projects/persistence/src/entity_base/transaction_table.rb', line 506

def validate!
  marked_created.each do |record|
    unless record.valid?
      raise InvalidRecordError, record
    end
  end

  marked_updated.each do |record|
    unless record.valid?
      raise InvalidRecordError, record
    end
  end
end